Carton



H. L. GREVE July 4, 1939.

CARTON Filed Sept. 16, 1937 2 Sheets-Sheet l INVENTOR 19 Z2 Z7 Jfflrman L. 6/?1 6 H. L. GREVE July 4, 1939. v

CARTON Filed Sept. 16, 1937 2 Sheets-Sheet 2 INVENTOR Jirmqn Z. 6mm? Patented July 4, 1939 Herman L. Grave, Hollis, N. Y., assignor to International Mailing Tube and Wrapper Company,

Long Island City, N. Y.

i Application September 16, 1937, Serial No. 164,103-

8 Claims.

My invention relates to cartons.

The object of my invention is to provide a carton constructed to withstand heavy pressure from within and without, and is preferably made of fibre-board which may be shipped to a customer in a flat condition and thereafter folded to provide a container.

The principal object of my invention is to strengthen and stiffen the two longer side portions of a carton to prevent them from bulging under a superimposed load, such as other cartons resting thereon when shipped full of merchandise and this I accomplish by placing braces or struts, or both, at each corner, the braces being preferably formed from a portion of the side flaps forming a part of the original blank.

A further object is to provide a carton of the character described without appreciably increasing its weight relative to a carton of the same size that is not formed to provide the reinforcing means used to stiffen and strengthen it.

Referring to the drawings which form a part of the specification;

Fig. 1 is a perspective view of a carton embodying my invention and discloses the bracing construction and elements used in further stiffening the braces.

Fig. 2 is a view of the blank as it appears prior to clamping the sides of the braces to form pockets therein when struts are used, one of which is shown in its brace.

Fig. 3 is a plan view showing the carton in a partially erected condition.

Fig. 4 is a perspective view of the stifiening means, one of which is located at each corner of the carton, and if required, one at each side of the carton midway between its ends, as shown.

Fig. 5 is a cross sectional View taken on line 5-5 of Fig. 4.

The blank ID is scored along the lines on which it is to be folded, in the usual manner well known to this art, and at one corner is shown a side flap H- asit appears prior to being folded back upon itself to form a vertically extending brace 12- which extends practically the entire depth of the carton, and inclosed between the outer sides l3- and inner interlocking flap portions l4- and l4. 1

As thus formed. the carton may be made without increasing its weight since no more material is used than in making them as heretofore.

In order to still further increase the stiffness and strength of the carton, I may make the interlocking side portions l4- and I4'-- of relatively different lengths so that the notches l5- and I5'- will be located a predetermined distance from the middle of the carton, the flaps I4- being folded on the lines I6- to provide the form illustrated at 12-- in Fig. 1, and this arrangement permits a brace to be formed in one 5 end of a flap portion .l4 which will provide a brace located midway between the ends of the carton, as illustrated in Fig. 1.

To still further strengthen the carton when designed to carry heavy materials, I inclose a 10 strut I'|'-- of thin wood or other suitable material in the fold or pocket "3- of the brace and secure it therein by clamp-ing the edges of the brace together by metal clips |9 or by cement, so that the struts will not be displaced in shipping the 15 blanks to a customer.

The struts l1- may extend slightly beyond the upper and lower ends of the pockets as illustrated, to secure their best bracing action, and if made of less length than that of the pocket or 20 brace, they still serve to strengthen the carton and protect its contents in shipping.

The weight of the struts is such as not to materially increase the weight of the carton, and their low cost does not materially increase the cost of 5 manufacturing it.

The construction of cartons of this type is so well known to manufacturers and users thereof that further description is not necessary for a full understandingthereof.

Having thus described my invention I claim as new:

1. A carton of the character described comprising a body portion having inner interlocked side portions an end of one of which is folded 35 upon itself and secured in fixed relation to, provide a brace extending from the lower to the upper side of said side portion.

2. The construction defined in claim 1, together with; and a strut carried by said brace and ex- 40 tending the length thereof.

3. A carton of the character described comprising a body portion having two-part interlocking side portions, one free end of said side portions being folded back upon itself to form 45 a brace substantially midway the length of the carton, said brace extending from the lower to the upper side of the carton.

4. The construction! defined in claim 3, together with; a strut carried by each of said 50 braces which extends from the lower to the upper side of the carton.

5. A carton of the character described comprising a body portion having two-part overlapping side portions which extend from the end portions of the carton, top flap portions extending from said end portions and formed to provide downwardly extending brace portions which extend from the upper side to the lower side of the carton and disposed outwardly of said overlapping side portions, said carton having an outer side flap portion extending from the bottom of the carton to the top thereof and inclosing said brace portions, said brace portions being formed to provide vertically extending pockets and struts in said pockets extending from the lower to the upper side of the carton.

6. A carton of the character described comprising a body portion having a top flap integral therewith, and an extension on at least one end of the top flap folded to provide a double thickness of material depending from the upper to the lower side of the carton on one side thereof to form a brace.

'7. A carton of the character described, comprising a body portion having top flap portions, side flap portions depending from the ends of the top flap portions to provide braces, said side flap portions being formed of a plurality of thicknesses of the material from which the carton is formed and said side flap portions extending downwardly from the upper side of the carton to substantially the lower side thereof.

8. A carton of the character set forth in claim "7, characterized by a reinforcing strut freely mounted in each side flap brace extending substantially the entire height of the carton and movable relative to said brace during formation of the carton for automatically adjusting itself into correct position in the brace.

HERMAN L. GREVE 

